I used to make mine, but when you start adding up the cost of the stock, and then the colour cartridges, etc. I found it was just as easy to order them.
I have a friend in the business who cuts me a bit of a deal, nothing outrageous. I get them 1,000 at a time. I punch a hole in them and tie them to my jars with raffia. Two sided with my business stuff on the front, and weight and directions for re-liquifying on the back. I don't mess with labels as I get a lot of my jars returned and labels glued to them are a pain. I can reuse the jars but must use new lids every time.